Starter Drive Combo Polaris ATV UTV Big Boss 300 400 400L Scrambler Sport Sportsman Trail Blazer Trail Boss XPlorer XPress New Aftermarket Part (Not Rebuilt/Refurbished/Repurposed) Please verify this is the right part number before ordering Starter Motor: 9 Teeth/Splines; CW Rotation Bendix Drive: 17 Gear Teeth; 1.535 inches wide Gear Diameter